2129 lines
78 KiB
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2129 lines
78 KiB
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>HermiteSpline - Cesium Documentation</title>
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<!--[if lt IE 9]>
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<script src="javascript/html5.js"></script>
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<![endif]-->
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<link href="styles/jsdoc-default.css" rel="stylesheet">
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<body>
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<div id="main">
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<h1 class="page-title">
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<a href="index.html"><img src="Images/CesiumLogo.png" class="cesiumLogo"></a>
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HermiteSpline
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<div class="titleCenterer"></div>
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</h1>
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<section>
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<header>
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<div class="container-overview">
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<div class="nameContainer">
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<h4 class="name" id="HermiteSpline">
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<a href="#HermiteSpline" class="doc-link"></a>
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new Cesium.HermiteSpline<span class="signature">(options)</span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L167">Core/HermiteSpline.js 167</a>
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</h4>
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</div>
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<div class="description">
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A Hermite spline is a cubic interpolating spline. Points, incoming tangents, outgoing tangents, and times
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must be defined for each control point. The outgoing tangents are defined for points [0, n - 2] and the incoming
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tangents are defined for points [1, n - 1]. For example, when interpolating a segment of the curve between <code>points[i]</code> and
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<code>points[i + 1]</code>, the tangents at the points will be <code>outTangents[i]</code> and <code>inTangents[i]</code>,
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respectively.
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</div>
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<table class="params">
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<thead>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th class="last">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="name"><code>options</code></td>
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<td class="type">
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<span class="param-type">Object</span>
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</td>
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<td class="description last">
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Object with the following properties:
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<table class="params">
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<thead>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th class="last">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="name"><code>times</code></td>
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<td class="type">
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<span class="param-type">Array.<Number></span>
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</td>
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<td class="description last">
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An array of strictly increasing, unit-less, floating-point times at each point.
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The values are in no way connected to the clock time. They are the parameterization for the curve.</td>
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</tr>
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<tr>
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<td class="name"><code>points</code></td>
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<td class="type">
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<span class="param-type">Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
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</td>
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<td class="description last">
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The array of <a href="Cartesian3.html"><code>Cartesian3</code></a> control points.</td>
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</tr>
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<tr>
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<td class="name"><code>inTangents</code></td>
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<td class="type">
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<span class="param-type">Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
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</td>
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<td class="description last">
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The array of <a href="Cartesian3.html"><code>Cartesian3</code></a> incoming tangents at each control point.</td>
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</tr>
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<tr>
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<td class="name"><code>outTangents</code></td>
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<td class="type">
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<span class="param-type">Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
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</td>
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<td class="description last">
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The array of <a href="Cartesian3.html"><code>Cartesian3</code></a> outgoing tangents at each control point.</td>
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</tr>
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</tbody>
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</table>
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</td>
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</tr>
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</tbody>
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</table>
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<h5>Throws:</h5>
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<ul>
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<li>
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<div class="param-desc">
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<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
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: points.length must be greater than or equal to 2.
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</div>
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</li>
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<li>
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<div class="param-desc">
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<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
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: times.length must be equal to points.length.
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</div>
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</li>
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<li>
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<div class="param-desc">
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<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
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: inTangents and outTangents must have a length equal to points.length - 1.
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</div>
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</li>
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</ul>
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<dl class="details">
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<h5>Example:</h5>
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<pre><code class="language-javascript">// Create a G<sup>1</sup> continuous Hermite spline
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const times = [ 0.0, 1.5, 3.0, 4.5, 6.0 ];
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const spline = new Cesium.HermiteSpline({
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times : times,
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points : [
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new Cesium.Cartesian3(1235398.0, -4810983.0, 4146266.0),
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new Cesium.Cartesian3(1372574.0, -5345182.0, 4606657.0),
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new Cesium.Cartesian3(-757983.0, -5542796.0, 4514323.0),
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new Cesium.Cartesian3(-2821260.0, -5248423.0, 4021290.0),
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new Cesium.Cartesian3(-2539788.0, -4724797.0, 3620093.0)
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],
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outTangents : [
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new Cesium.Cartesian3(1125196, -161816, 270551),
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new Cesium.Cartesian3(-996690.5, -365906.5, 184028.5),
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new Cesium.Cartesian3(-2096917, 48379.5, -292683.5),
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new Cesium.Cartesian3(-890902.5, 408999.5, -447115)
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],
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inTangents : [
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new Cesium.Cartesian3(-1993381, -731813, 368057),
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new Cesium.Cartesian3(-4193834, 96759, -585367),
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new Cesium.Cartesian3(-1781805, 817999, -894230),
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new Cesium.Cartesian3(1165345, 112641, 47281)
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]
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});
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const p0 = spline.evaluate(times[0]);</code></pre>
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<h5>See:</h5>
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<ul class="see-list">
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<li><a href="CatmullRomSpline.html">CatmullRomSpline</a></li>
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<li><a href="LinearSpline.html">LinearSpline</a></li>
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<li><a href="QuaternionSpline.html">QuaternionSpline</a></li>
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<li><a href="WeightSpline.html">WeightSpline</a></li>
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</ul>
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</dl>
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</div>
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<h3 class="subsection-title">Members</h3>
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<div class="nameContainer">
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<h4 class="name" id="inTangents">
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<a href="#inTangents" class="doc-link"></a>
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<span class="type-signature attribute-readonly">readonly</span> inTangents<span class="type-signature"> : Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L249">Core/HermiteSpline.js 249</a>
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</div>
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</h4>
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</div>
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<div class="description">
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An array of <a href="Cartesian3.html"><code>Cartesian3</code></a> incoming tangents at each control point.
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</div>
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<dl class="details">
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</dl>
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<div class="nameContainer">
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<h4 class="name" id="outTangents">
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<a href="#outTangents" class="doc-link"></a>
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<span class="type-signature attribute-readonly">readonly</span> outTangents<span class="type-signature"> : Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L263">Core/HermiteSpline.js 263</a>
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</div>
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</h4>
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</div>
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<div class="description">
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An array of <a href="Cartesian3.html"><code>Cartesian3</code></a> outgoing tangents at each control point.
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</div>
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<dl class="details">
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</dl>
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<div class="nameContainer">
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<h4 class="name" id="points">
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<a href="#points" class="doc-link"></a>
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<span class="type-signature attribute-readonly">readonly</span> points<span class="type-signature"> : Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L235">Core/HermiteSpline.js 235</a>
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</div>
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</h4>
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</div>
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<div class="description">
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An array of <a href="Cartesian3.html"><code>Cartesian3</code></a> control points.
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</div>
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<dl class="details">
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</dl>
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<div class="nameContainer">
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<h4 class="name" id="times">
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<a href="#times" class="doc-link"></a>
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<span class="type-signature attribute-readonly">readonly</span> times<span class="type-signature"> : Array.<Number></span>
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<div class="source-link rightLinks">
|
||
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L221">Core/HermiteSpline.js 221</a>
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||
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</div>
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</h4>
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</div>
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<div class="description">
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||
|
An array of times for the control points.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h3 class="subsection-title">Methods</h3>
|
||
|
|
||
|
|
||
|
|
||
|
<div class="nameContainer">
|
||
|
<h4 class="name" id=".createC1">
|
||
|
<a href="#.createC1" class="doc-link"></a>
|
||
|
<span class="type-signature attribute-static">static</span> Cesium.HermiteSpline.createC1<span class="signature">(options)</span> → <span class="type-signature returnType"><a href="HermiteSpline.html">HermiteSpline</a></span>
|
||
|
|
||
|
|
||
|
<div class="source-link rightLinks">
|
||
|
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L308">Core/HermiteSpline.js 308</a>
|
||
|
</div>
|
||
|
|
||
|
|
||
|
</h4>
|
||
|
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="description">
|
||
|
Creates a spline where the tangents at each control point are the same.
|
||
|
The curves are guaranteed to be at least in the class C<sup>1</sup>.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>options</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Object</span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
Object with the following properties:
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>times</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Array.<Number></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The array of control point times.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>points</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The array of control points.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>tangents</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The array of tangents at the control points.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Returns:</h5>
|
||
|
|
||
|
|
||
|
<div class="param-desc">
|
||
|
A hermite spline.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Throws:</h5>
|
||
|
<ul>
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: points, times and tangents are required.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: points.length must be greater than or equal to 2.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: times, points and tangents must have the same length.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
</ul>
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Example:</h5>
|
||
|
|
||
|
<pre><code class="language-javascript">const points = [
|
||
|
new Cesium.Cartesian3(1235398.0, -4810983.0, 4146266.0),
|
||
|
new Cesium.Cartesian3(1372574.0, -5345182.0, 4606657.0),
|
||
|
new Cesium.Cartesian3(-757983.0, -5542796.0, 4514323.0),
|
||
|
new Cesium.Cartesian3(-2821260.0, -5248423.0, 4021290.0),
|
||
|
new Cesium.Cartesian3(-2539788.0, -4724797.0, 3620093.0)
|
||
|
];
|
||
|
|
||
|
// Add tangents
|
||
|
const tangents = new Array(points.length);
|
||
|
tangents[0] = new Cesium.Cartesian3(1125196, -161816, 270551);
|
||
|
const temp = new Cesium.Cartesian3();
|
||
|
for (let i = 1; i < tangents.length - 1; ++i) {
|
||
|
tangents[i] = Cesium.Cartesian3.multiplyByScalar(Cesium.Cartesian3.subtract(points[i + 1], points[i - 1], temp), 0.5, new Cesium.Cartesian3());
|
||
|
}
|
||
|
tangents[tangents.length - 1] = new Cesium.Cartesian3(1165345, 112641, 47281);
|
||
|
|
||
|
const spline = Cesium.HermiteSpline.createC1({
|
||
|
times : times,
|
||
|
points : points,
|
||
|
tangents : tangents
|
||
|
});</code></pre>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="nameContainer">
|
||
|
<h4 class="name" id=".createClampedCubic">
|
||
|
<a href="#.createClampedCubic" class="doc-link"></a>
|
||
|
<span class="type-signature attribute-static">static</span> Cesium.HermiteSpline.createClampedCubic<span class="signature">(options)</span> → <span class="type-signature returnType"><a href="HermiteSpline.html">HermiteSpline</a>|<a href="LinearSpline.html">LinearSpline</a></span>
|
||
|
|
||
|
|
||
|
<div class="source-link rightLinks">
|
||
|
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L437">Core/HermiteSpline.js 437</a>
|
||
|
</div>
|
||
|
|
||
|
|
||
|
</h4>
|
||
|
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="description">
|
||
|
Creates a clamped cubic spline. The tangents at the interior control points are generated
|
||
|
to create a curve in the class C<sup>2</sup>.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>options</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Object</span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
Object with the following properties:
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>times</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Array.<Number></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The array of control point times.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>points</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The array of control points.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>firstTangent</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The outgoing tangent of the first control point.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>lastTangent</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The incoming tangent of the last control point.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Returns:</h5>
|
||
|
|
||
|
|
||
|
<div class="param-desc">
|
||
|
A hermite spline or a linear spline if less than 3 control points were given.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Throws:</h5>
|
||
|
<ul>
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: points, times, firstTangent and lastTangent are required.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: points.length must be greater than or equal to 2.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: times.length must be equal to points.length.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
</ul>
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Example:</h5>
|
||
|
|
||
|
<pre><code class="language-javascript">// Create a clamped cubic spline above the earth from Philadelphia to Los Angeles.
|
||
|
const spline = Cesium.HermiteSpline.createClampedCubic({
|
||
|
times : [ 0.0, 1.5, 3.0, 4.5, 6.0 ],
|
||
|
points : [
|
||
|
new Cesium.Cartesian3(1235398.0, -4810983.0, 4146266.0),
|
||
|
new Cesium.Cartesian3(1372574.0, -5345182.0, 4606657.0),
|
||
|
new Cesium.Cartesian3(-757983.0, -5542796.0, 4514323.0),
|
||
|
new Cesium.Cartesian3(-2821260.0, -5248423.0, 4021290.0),
|
||
|
new Cesium.Cartesian3(-2539788.0, -4724797.0, 3620093.0)
|
||
|
],
|
||
|
firstTangent : new Cesium.Cartesian3(1125196, -161816, 270551),
|
||
|
lastTangent : new Cesium.Cartesian3(1165345, 112641, 47281)
|
||
|
});</code></pre>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="nameContainer">
|
||
|
<h4 class="name" id=".createNaturalCubic">
|
||
|
<a href="#.createNaturalCubic" class="doc-link"></a>
|
||
|
<span class="type-signature attribute-static">static</span> Cesium.HermiteSpline.createNaturalCubic<span class="signature">(options)</span> → <span class="type-signature returnType"><a href="HermiteSpline.html">HermiteSpline</a>|<a href="LinearSpline.html">LinearSpline</a></span>
|
||
|
|
||
|
|
||
|
<div class="source-link rightLinks">
|
||
|
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L368">Core/HermiteSpline.js 368</a>
|
||
|
</div>
|
||
|
|
||
|
|
||
|
</h4>
|
||
|
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="description">
|
||
|
Creates a natural cubic spline. The tangents at the control points are generated
|
||
|
to create a curve in the class C<sup>2</sup>.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>options</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Object</span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
Object with the following properties:
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>times</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Array.<Number></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The array of control point times.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>points</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Array.<<a href="Cartesian3.html">Cartesian3</a>></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The array of control points.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Returns:</h5>
|
||
|
|
||
|
|
||
|
<div class="param-desc">
|
||
|
A hermite spline or a linear spline if less than 3 control points were given.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Throws:</h5>
|
||
|
<ul>
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: points and times are required.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: points.length must be greater than or equal to 2.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: times.length must be equal to points.length.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
</ul>
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Example:</h5>
|
||
|
|
||
|
<pre><code class="language-javascript">// Create a natural cubic spline above the earth from Philadelphia to Los Angeles.
|
||
|
const spline = Cesium.HermiteSpline.createNaturalCubic({
|
||
|
times : [ 0.0, 1.5, 3.0, 4.5, 6.0 ],
|
||
|
points : [
|
||
|
new Cesium.Cartesian3(1235398.0, -4810983.0, 4146266.0),
|
||
|
new Cesium.Cartesian3(1372574.0, -5345182.0, 4606657.0),
|
||
|
new Cesium.Cartesian3(-757983.0, -5542796.0, 4514323.0),
|
||
|
new Cesium.Cartesian3(-2821260.0, -5248423.0, 4021290.0),
|
||
|
new Cesium.Cartesian3(-2539788.0, -4724797.0, 3620093.0)
|
||
|
]
|
||
|
});</code></pre>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="nameContainer">
|
||
|
<h4 class="name" id="clampTime">
|
||
|
<a href="#clampTime" class="doc-link"></a>
|
||
|
clampTime<span class="signature">(time)</span> → <span class="type-signature returnType">Number</span>
|
||
|
|
||
|
|
||
|
<div class="source-link rightLinks">
|
||
|
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L537">Core/HermiteSpline.js 537</a>
|
||
|
</div>
|
||
|
|
||
|
|
||
|
</h4>
|
||
|
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="description">
|
||
|
Clamps the given time to the period covered by the spline.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>time</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Number</span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The time.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Returns:</h5>
|
||
|
|
||
|
|
||
|
<div class="param-desc">
|
||
|
The time, clamped to the animation period.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="nameContainer">
|
||
|
<h4 class="name" id="evaluate">
|
||
|
<a href="#evaluate" class="doc-link"></a>
|
||
|
evaluate<span class="signature">(time, <span class="optional">result</span>)</span> → <span class="type-signature returnType"><a href="Cartesian3.html">Cartesian3</a></span>
|
||
|
|
||
|
|
||
|
<div class="source-link rightLinks">
|
||
|
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L550">Core/HermiteSpline.js 550</a>
|
||
|
</div>
|
||
|
|
||
|
|
||
|
</h4>
|
||
|
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="description">
|
||
|
Evaluates the curve at a given time.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>time</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Number</span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
The time at which to evaluate the curve.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>result</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
|
||
|
<span class="optional">optional</span>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
The object onto which to store the result.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Returns:</h5>
|
||
|
|
||
|
|
||
|
<div class="param-desc">
|
||
|
The modified result parameter or a new instance of the point on the curve at the given time.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Throws:</h5>
|
||
|
<ul>
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: time must be in the range <code>[t<sub>0</sub>, t<sub>n</sub>]</code>, where <code>t<sub>0</sub></code>
|
||
|
is the first element in the array <code>times</code> and <code>t<sub>n</sub></code> is the last element
|
||
|
in the array <code>times</code>.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
</ul>
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="nameContainer">
|
||
|
<h4 class="name" id="findTimeInterval">
|
||
|
<a href="#findTimeInterval" class="doc-link"></a>
|
||
|
findTimeInterval<span class="signature">(time)</span> → <span class="type-signature returnType">Number</span>
|
||
|
|
||
|
|
||
|
<div class="source-link rightLinks">
|
||
|
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L516">Core/HermiteSpline.js 516</a>
|
||
|
</div>
|
||
|
|
||
|
|
||
|
</h4>
|
||
|
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="description">
|
||
|
Finds an index <code>i</code> in <code>times</code> such that the parameter
|
||
|
<code>time</code> is in the interval <code>[times[i], times[i + 1]]</code>.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>time</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Number</span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The time.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
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|
||
|
|
||
|
|
||
|
|
||
|
<h5>Returns:</h5>
|
||
|
|
||
|
|
||
|
<div class="param-desc">
|
||
|
The index for the element at the start of the interval.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Throws:</h5>
|
||
|
<ul>
|
||
|
<li>
|
||
|
|
||
|
<div class="param-desc">
|
||
|
|
||
|
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
|
||
|
|
||
|
: time must be in the range <code>[t<sub>0</sub>, t<sub>n</sub>]</code>, where <code>t<sub>0</sub></code>
|
||
|
is the first element in the array <code>times</code> and <code>t<sub>n</sub></code> is the last element
|
||
|
in the array <code>times</code>.
|
||
|
</div>
|
||
|
|
||
|
</li>
|
||
|
</ul>
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="nameContainer">
|
||
|
<h4 class="name" id="wrapTime">
|
||
|
<a href="#wrapTime" class="doc-link"></a>
|
||
|
wrapTime<span class="signature">(time)</span> → <span class="type-signature returnType">Number</span>
|
||
|
|
||
|
|
||
|
<div class="source-link rightLinks">
|
||
|
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/HermiteSpline.js#L528">Core/HermiteSpline.js 528</a>
|
||
|
</div>
|
||
|
|
||
|
|
||
|
</h4>
|
||
|
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<div class="description">
|
||
|
Wraps the given time to the period covered by the spline.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<table class="params">
|
||
|
<thead>
|
||
|
<tr>
|
||
|
|
||
|
<th>Name</th>
|
||
|
|
||
|
|
||
|
<th>Type</th>
|
||
|
|
||
|
|
||
|
|
||
|
<th class="last">Description</th>
|
||
|
</tr>
|
||
|
</thead>
|
||
|
|
||
|
<tbody>
|
||
|
|
||
|
|
||
|
<tr>
|
||
|
|
||
|
<td class="name"><code>time</code></td>
|
||
|
|
||
|
|
||
|
<td class="type">
|
||
|
|
||
|
|
||
|
<span class="param-type">Number</span>
|
||
|
|
||
|
|
||
|
|
||
|
</td>
|
||
|
|
||
|
|
||
|
|
||
|
<td class="description last">
|
||
|
|
||
|
The time.</td>
|
||
|
</tr>
|
||
|
|
||
|
|
||
|
</tbody>
|
||
|
</table>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<h5>Returns:</h5>
|
||
|
|
||
|
|
||
|
<div class="param-desc">
|
||
|
The time, wrapped around to the updated animation.
|
||
|
</div>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
<dl class="details">
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</dl>
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
</article>
|
||
|
|
||
|
</section>
|
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||
|
|
||
|
|
||
|
|
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.6.10</a>
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